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Elsystem / SV: Hur du ansluter insprutarna?
« skrivet: oktober 20, 2011, 12:50:07 »
Hello again! The front pulley didn`t had anything broken, it was my fault 
:when i have dismantled the engine apart, i though i`ve lost the locking pin from the big pulley, so i made one from a screw (with my grinder).
But, the locking pin is in fact one piece with the crank distribution wheel (from one side). So, each time when i have tried to mount the pulley, those two pins kept hitting one against each other, causing that terrible vobbling.
Here`s something good, it is not my post, i just made copy/ paste from www.volvo300mania.com:
Some trivial info about the crank differencies for those who might be interested.
B2XX -series engines have eight counter balances on the crank and the crank is cast one. Older B2X engines have only four counter balances but the crank is stronger, forged steel. Also one major difference between these engines is that b2xx -series ones are so called "low friction" engines. Volvo came up with the "great idea" of making the B2xx -series engines piston guided instead of crank guided. This means that the con rod is guided/centered from the piston end and there's a notable side clearance at the crank end of the con rod bearings. Normally clearances at the crank end of the con rod are made as tight as possible and the con rod is guided/centered from the crank.
This piston guided -setup works very well with the high revving race engines (idea was probably copied from racing scene) and does infact lower friction losses in those but it didn't turn out to be as good with the redblocks where the torque comes at rather low revs.. Problem with this kind of setup is that if the crank get's any play or vibration it will cause the con rods to fail/bend very quickly because of the rather large side clearances at the crank end of the con rod (this is also one of the main reasons why Volvo switched back to thicker con rods with the b2xx -series engines also after year -90 and switched to larger big end bearings, to add more security factor). This is also the reason why there's a damper fitted at the b2xx -series engines at the crank pulley. It's there to minimize all the possible vibrations of the crank.
But even so, many people have even used aluminium crank pulleys with b2xx -series cranks without any problems so I think it's not as big of a problem in the reality in normal use.
All the best, Alex.
:when i have dismantled the engine apart, i though i`ve lost the locking pin from the big pulley, so i made one from a screw (with my grinder).But, the locking pin is in fact one piece with the crank distribution wheel (from one side). So, each time when i have tried to mount the pulley, those two pins kept hitting one against each other, causing that terrible vobbling.
Here`s something good, it is not my post, i just made copy/ paste from www.volvo300mania.com:
Some trivial info about the crank differencies for those who might be interested.
B2XX -series engines have eight counter balances on the crank and the crank is cast one. Older B2X engines have only four counter balances but the crank is stronger, forged steel. Also one major difference between these engines is that b2xx -series ones are so called "low friction" engines. Volvo came up with the "great idea" of making the B2xx -series engines piston guided instead of crank guided. This means that the con rod is guided/centered from the piston end and there's a notable side clearance at the crank end of the con rod bearings. Normally clearances at the crank end of the con rod are made as tight as possible and the con rod is guided/centered from the crank.
This piston guided -setup works very well with the high revving race engines (idea was probably copied from racing scene) and does infact lower friction losses in those but it didn't turn out to be as good with the redblocks where the torque comes at rather low revs.. Problem with this kind of setup is that if the crank get's any play or vibration it will cause the con rods to fail/bend very quickly because of the rather large side clearances at the crank end of the con rod (this is also one of the main reasons why Volvo switched back to thicker con rods with the b2xx -series engines also after year -90 and switched to larger big end bearings, to add more security factor). This is also the reason why there's a damper fitted at the b2xx -series engines at the crank pulley. It's there to minimize all the possible vibrations of the crank.
But even so, many people have even used aluminium crank pulleys with b2xx -series cranks without any problems so I think it's not as big of a problem in the reality in normal use.
All the best, Alex.
please tell me if it`s ok to install a B 19 lighter front pulley instead a heavy B200 one. i cannot use no more the original pulley, and i can`t find another one to replace (not even from scrap yard). the pulley from B 19 needs some trimming in order to fit, but that`s not the problem.
I love you guys! 
yes, and please excuse me if i was totally incomprehensible.